Reaction kettle for preparing polyurethane adhesive

Abstract

The invention discloses a reaction kettle for polyurethane adhesive preparation, and belongs to the field of polyurethane adhesive preparation.The reaction kettle comprises a sealing tank and a driving mechanism, the driving mechanism comprises a first servo motor fixedly connected to the middle of a sealing cover, and the output end of the first servo motor is fixedly connected with a first driving rod; the first driving rod penetrates through the sealing tank and is provided with a mixing mechanism for mixing various raw materials; according to the scheme, the driving mechanism and the mixing mechanism are arranged, a roller drives a rotating rod to rotate in a U-shaped limiting seat through the driving mechanism, so that the rotating rod drives a stirring impeller to rotate, a fixed rod is used for stirring and mixing raw materials in the sealing tank at the same time, and under the double stirring operation of the stirring impeller and the fixed rod, the mixing efficiency is improved. According to the adhesive preparation device, the situation that raw materials are mixed unevenly can be effectively reduced, meanwhile, the raw materials on the periphery of the sealing tank can be fully mixed, and the problem that the use effect of a product is reduced due to the fact that bubbles and cavities are generated in a prepared adhesive is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of polyurethane adhesive preparation, and more specifically, to a reaction kettle for preparing polyurethane adhesives. Background Art

[0002] Polyurethane adhesives are a versatile bonding material, known for their excellent adhesion performance, durability, and ability to adapt to various substrates. It is a polymer synthesized by the chemical reaction of isocyanate and polyol. This adhesive can be in the form of a single-component or a two-component, and each form has its specific application scenarios and advantages. For example, a two-component polyurethane adhesive consists of a main agent (usually containing polyol) and a hardener (usually containing isocyanate), and these two components need to be mixed in a specific ratio before use. The mixed adhesive can provide a longer working time and better mechanical properties. During the preparation of polyurethane adhesives, the reaction kettle is one of the key equipment for mixing and reacting isocyanate and polyol.

[0003] However, during the preparation of polyurethane adhesives using a reaction kettle, in order to ensure that each batch of raw materials is evenly mixed, most existing reaction kettles need to add the raw materials in batches, and after fully mixing each batch, the next batch is added. This operation process takes a long time and is not conducive to the large-scale production of polyurethane adhesives. Even when adding in batches, the existing stirring equipment cannot ensure sufficient contact between the raw materials and polyol. In the case of uneven mixing, the viscosity and fluidity inside the adhesive are inconsistent, resulting in higher viscosity in some areas and lower viscosity in other areas. The high-viscosity areas will trap and retain air bubbles, while the air bubbles in the low-viscosity areas are more likely to move and merge. This uneven bubble distribution will cause a large number of air bubbles and voids in the final product, reducing the use effect of the product. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a reaction kettle for preparing polyurethane adhesives, aiming to solve the above technical problems.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A reaction kettle for preparing a polyurethane adhesive, comprising a sealed tank. A discharge pipe is fixedly connected to the bottom of the sealed tank, and a sealing cover is threadedly connected to the top of the sealed tank. Inside the sealed tank, there are a first premixing hopper and a second premixing hopper. The structures and functions of the first premixing hopper and the second premixing hopper are the same. Inside the first premixing hopper and the second premixing hopper, there are premixing mechanisms for premixing raw materials. In the middle of the first premixing hopper and the second premixing hopper, there is a driving mechanism for driving the operation of the premixing mechanism. The driving mechanism includes a first servo motor fixedly connected to the middle of the sealing cover. The output end of the first servo motor is fixedly connected to a first driving rod, and the first driving rod penetrates through the sealed tank and is provided with a mixing mechanism for mixing various raw materials. Among them, the mixing mechanism includes a fixed sleeve fixedly connected to the outer cylindrical surface of the first driving rod. The outer cylindrical surface of the fixed sleeve is fixedly connected with connecting plates around it. The fixed sleeve is fixedly connected with a U-shaped limiting seat through the connecting plates. A rotating rod is rotatably connected inside the U-shaped limiting seat. A stirring impeller is fixedly connected to the outer cylindrical surface of the rotating rod, and a roller is fixedly connected to the upper end of the outer cylindrical surface of the rotating rod.

[0007] As a further scheme of the present invention: The outer cylindrical surface of the roller is in contact with the sealed tank to facilitate the rotation of the roller on the sealed tank. The bottom of the connecting plate is fixedly connected with fixed rods arranged in a linear array.

[0008] As a further scheme of the present invention: The top open end of the first premixing hopper is threadedly connected with a locking cover. The premixing mechanism includes a premixing rod rotatably connected to the middle inside the first premixing hopper. There is a fixed seat fixedly connected to the inner wall of the first premixing hopper at the bottom of the premixing rod. Limiting circular plates fixedly connected to the outer cylindrical surface of the premixing rod are arranged on the upper and lower surfaces of the locking cover. Stirring rods arranged in a linear array are fixedly connected to the outer cylindrical surface of the premixing rod.

[0009] As a further scheme of the present invention: The premixing mechanism further includes a support rod fixedly connected to the middle of the outer cylindrical surface of the premixing rod. The premixing rod is fixedly connected with a scraper for scraping the residual raw materials on the inner wall of the first premixing hopper through the support rod. A clamping block for cooperating with the driving mechanism is arranged around the top of the outer cylindrical surface of the premixing rod.

[0010] As a further scheme of the present invention: The driving mechanism further includes an adapter sleeve sleeved on the top of the premixing rod. A support rod is fixedly connected to the upper surface of the adapter sleeve. A support cylinder is fixedly connected to the top of the support rod. Above the support cylinder, there is a storage mechanism for supplying materials to the first premixing hopper. A driven gear is fixedly connected to the outer cylindrical surface of the support rod. A main gear fixedly connected to the first driving rod is arranged at the bottom of the first servo motor. A gear belt is sleeved on the surfaces of the main gear and the driven gear.

[0011] As a further solution of the present invention: a card slot arranged in a circular arrangement is fixedly connected to the inner wall of the adapter sleeve; and the card slot is used in cooperation with the card block to drive the support rod to rotate.

[0012] As a further solution of the present invention: limiting frames are fixedly connected to the front and rear sides of the top of the locking cover. A circulation port is opened on one side inside the locking cover. The storage mechanism includes a first storage barrel and a second storage barrel respectively arranged above the first pre-mixing hopper and the second pre-mixing hopper; and the structures and functions of the first storage barrel and the second storage barrel are the same. Support plates used in cooperation with the limiting frames are fixedly connected to the front and rear sides of the bottom of the first storage barrel. A limiting rod is fixedly connected to the middle of the bottom of the first storage barrel. A circulation pipe is fixedly communicated with the bottom of the first storage barrel; and the position of the circulation pipe corresponds to the circulation port to facilitate the transportation of raw materials.

[0013] As a further solution of the present invention: a bucket cover is threadedly connected to the top of the first storage barrel. A feeding hopper is fixedly communicated with one side of the top of the first storage barrel. A filter screen is fixedly connected to the middle of the inside of the first storage barrel. Anti-blocking mechanisms for cleaning the filter screen are arranged inside the first storage barrel and the second storage barrel to facilitate the filter screen to ensure normal filtering operation.

[0014] As a further solution of the present invention: the anti-blocking mechanism includes a second servo motor fixedly connected to the middle of the top of the bucket cover. The output end of the second servo motor is fixedly connected to a second driving rod. A first cleaning plate fixedly connected to the second driving rod is arranged on the upper surface of the filter screen. A second cleaning plate fixedly connected to the second driving rod is arranged at the bottom inside the first storage barrel.

[0015] As a further solution of the present invention: a belt transmission assembly for simultaneously driving the first storage barrel and the second storage barrel to perform cleaning operations is arranged on the outer circumferential surface of the second driving rod.

[0016] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects: (1) In this solution, by setting a driving mechanism and a mixing mechanism, the driving mechanism enables the roller to drive the rotating rod to rotate in the U-shaped limiting seat, and then the rotating rod drives the stirring impeller to rotate. At the same time, during the rotation of the connecting plate, the raw materials inside the sealing tank are simultaneously stirred and mixed by using the fixing rod. Under the dual stirring operations of the stirring impeller and the fixing rod, the situation of uneven mixing of raw materials can be effectively reduced, and the raw materials around the sealing tank can also be fully mixed, thereby avoiding the problem that the viscosity and fluidity inside the adhesive are inconsistent, resulting in a large number of bubbles and voids in the final product and reducing the use effect of the product.

[0017] (2) By setting up a premixing mechanism and a driving mechanism, the driving mechanism drives the premixing rod to rotate in the fixed seat, so that the premixing rod drives the stirring rod to stir the raw materials in the first premixing hopper and the second premixing hopper. And during the rotation of the premixing rod, the support rod drives the scraper to scrape the residual raw materials on the inner walls of the first premixing hopper and the second premixing hopper respectively, effectively avoiding the waste of raw materials caused by the adhesion of raw materials, resulting in part of the raw materials remaining on the inner walls of the first premixing hopper and the second premixing hopper during the mixing process, and making the overall preparation cost too high.

[0018] (3) By setting up a storage mechanism, a filter plate and an anti-blocking mechanism, through the cooperation of the support plate and the limiting rod, the stable positioning of the storage barrel is ensured, the filter plate filters the raw materials, and the anti-blocking mechanism cleans the filter plate to ensure the normal filtering function of the filter plate. During use, through the setting of the storage mechanism, the pretreatment and filtration of the raw materials are realized, the purity of the raw materials is ensured, the uneven mixing and bubble generation caused by impurities are reduced, and the quality of the final product is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is Figure 1 a cross-sectional view of; Figure 3 is a schematic diagram of the split connection of the premixing mechanism and the storage mechanism of the present invention; Figure 4 is a schematic diagram of the structure of the premixing mechanism of the present invention; Figure 5 is a schematic diagram of the structure of the driving mechanism of the present invention; Figure 6 is a schematic diagram of the internal cross-sectional connection of the storage mechanism of the present invention; Figure 7 is a schematic diagram of the structure of the mixing mechanism of the present invention.

[0021] Reference Signs: 1. Sealed tank; 2. Sealed cover; 3. First premixing hopper; 31. Locking cover; 32. Circulation port; 33. Limiting frame; 4. Second premixing hopper; 5. Premixing mechanism; 51. Premixing rod; 52. Limiting seat; 53. Limiting circular plate; 54. Block; 55. Stirring rod; 56. Support rod; 57. Scraper; 6. Driving mechanism; 61. Support rod; 62. Adapter sleeve; 63. Support cylinder; 64. Driven gear; 65. First servo motor; 66. First driving rod; 67. Main gear; 68. Gear belt; 7. Material storage mechanism; 71. First storage barrel; 72. Support plate; 73. Limit rod; 74. Flow pipe; 75. Bucket cover; 76. Feeding hopper; 77. Second storage barrel; 8. Filter screen; 9. Anti-blocking mechanism; 91. Second servo motor; 92. Second driving rod; 93. First cleaning plate; 94. Second cleaning plate; 95. Belt drive assembly; 10. Mixing mechanism; 101. Fixed sleeve; 102. Connecting plate; 103. U-shaped limit seat; 104. Rotating rod; 105. Stirring impeller; 106. Roller; 107. Fixed rod.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0023] The following describes in detail a reaction kettle for preparing polyurethane adhesive provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0024] As Figures 1 to 7 shown, an embodiment of the present invention provides a reaction kettle for preparing polyurethane adhesive, including a sealed tank 1. The bottom of the sealed tank 1 is fixedly communicated with a discharge pipe, and the top of the sealed tank 1 is threadedly connected with a sealed cover 2. Inside the sealed tank 1, there are a first premixing hopper 3 and a second premixing hopper 4. The structures and functions of the first premixing hopper 3 and the second premixing hopper 4 are the same. Inside the first premixing hopper 3 and the second premixing hopper 4, there is a premixing mechanism 5 for premixing raw materials. At the middle of the first premixing hopper 3 and the second premixing hopper 4, there is a driving mechanism 6 for driving the operation of the premixing mechanism 5. The driving mechanism 6 includes a first servo motor 65 fixedly connected to the middle of the sealed cover 2. The output end of the first servo motor 65 is fixedly connected with a first driving rod 66. The first driving rod 66 penetrates through the sealed tank 1 and is provided with a mixing mechanism 10 for mixing various raw materials; Among them, the mixing mechanism 10 includes a fixed sleeve 101 fixedly connected to the outer cylindrical surface of the first driving rod 66. A connecting plate 102 is fixedly connected around the outer cylindrical surface of the fixed sleeve 101. The fixed sleeve 101 is fixedly connected with a U-shaped limiting seat 103 through the connecting plate 102. A rotating rod 104 is rotatably connected inside the U-shaped limiting seat 103. A stirring impeller 105 is fixedly connected to the outer cylindrical surface of the rotating rod 104. A roller 106 is fixedly connected to the upper end of the outer cylindrical surface of the rotating rod 104.

[0025] As Figure 2 , Figure 7 shown, the outer cylindrical surface of the roller 106 is in contact with the sealing tank 1 so as to facilitate the rotation of the roller 106 on the sealing tank 1. The bottom of the connecting plate 102 is fixedly connected with fixing rods 107 arranged in a linear array.

[0026] To solve the problem that in the process of preparing two-component polyurethane adhesive using a reaction kettle, it is impossible to ensure sufficient contact between the raw materials and polyol, resulting in inconsistent viscosity and fluidity inside the adhesive when the mixing is uneven, leading to a large number of bubbles and voids in the final product and reducing the use effect of the product. Now, the above technical solution is adopted to solve this problem. The above technical solution mainly consists of a driving mechanism 6 and a mixing mechanism 10. When preparing two-component polyurethane adhesive, the discharge valves of the first premixing hopper 3 and the second premixing hopper 4 can be opened simultaneously to allow the raw materials inside to flow into the sealing tank 1. At this time, by starting the first servo motor 65, the first driving rod 66 can be rotated, and the rotation of the first driving rod 66 can drive the fixed sleeve 101 to rotate synchronously, thereby driving the U-shaped limiting seat 103 to rotate through the connecting plate 102. During the process of the U-shaped limiting seat 103 moving in a circular motion around the first driving rod 66, since the outer cylindrical surface of the roller 106 is in contact with the inner wall of the sealing tank 1, the roller 106 can drive the rotating rod 104 to rotate inside the U-shaped limiting seat 103, and then the rotating rod 104 can drive the stirring impeller 105 to rotate, and the stirring impeller 105 is used to fully mix the raw materials inside the sealing tank 1. At the same time, during the rotation of the connecting plate 102, the fixing rods 107 are used to simultaneously stir and mix the raw materials inside the sealing tank 1. Under the dual stirring operations of the stirring impeller 105 and the fixing rods 107, the situation of uneven mixing of raw materials can be effectively reduced, and at the same time, the raw materials around the sealing tank 1 can also be fully mixed, effectively avoiding the problems of inconsistent viscosity and fluidity inside the adhesive, resulting in a large number of bubbles and voids in the final product and reducing the use effect of the product. At the same time, through sufficient mixing, the possibility of trapping and retaining bubbles in the high-viscosity region is reduced, and the generation of bubbles and voids in the final product is reduced.

[0027] As Figure 3 , Figure 4As shown, a locking cover 31 is threadedly connected to the top open end of the first premixing bucket 3, and the premixing mechanism 5 includes a premixing rod 51 rotatably connected to the middle of the first premixing bucket 3, and a fixing seat 52 fixedly connected to the inner wall of the first premixing bucket 3 is provided at the bottom of the premixing rod 51, and limiting circular plates 53 fixedly connected to the outer circumferential surface of the premixing rod 51 are provided on the upper and lower surfaces of the locking cover 31, and the outer circumferential surface of the premixing rod 51 is fixedly connected to linearly arranged stirring rods 55.

[0028] like Figure 3 , Figure 4 As shown, the premixing mechanism 5 also includes a support rod 56 fixedly connected to the middle of the outer circumferential surface of the premixing rod 51, and the premixing rod 51 is fixedly connected to a scraper 57 for scraping residual raw materials on the inner wall of the first premixing bucket 3 through the support rod 56. A block 54 for use with the driving mechanism 6 is arranged around the top of the outer circumferential surface of the premixing rod 51.

[0029] When preparing two-component polyurethane adhesive, the added raw materials and corresponding additives are of many types, and the preparation process is relatively complicated, which seriously reduces the overall preparation efficiency. Therefore, in the process of using the driving mechanism 6 to make the stirring impeller 105 and the fixed rod 107 mix the raw materials in the first premixing bucket 3 and the second premixing bucket 4, the driving mechanism 6 can be used to make the premixing mechanism 5 in the first premixing bucket 3 and the second premixing bucket 4 perform the raw material premixing operation at the same time. The specific operation process is: in the process of using the driving mechanism 6 to drive the premixing rod 51 to rotate in the fixed seat 52, the limiting circular plate 53 ensures the stability of the premixing rod 51 during the rotation process. The rotation of the premixing rod 51 drives the stirring rod 55 to stir the raw materials in the first premixing bucket 3 and the second premixing bucket 4. In addition, during the rotation of the premixing rod 51, the support rod 56 drives the scraper 57 to scrape off the residual raw materials on the inner walls of the first premixing bucket 3 and the second premixing bucket 4, respectively, thereby effectively avoiding the situation where part of the raw materials remain on the inner walls of the first premixing bucket 3 and the second premixing bucket 4 during the mixing process due to the adhesion of the raw materials, resulting in a waste of raw materials and making the entire preparation cost too high.

[0030] like Figure 1 , Figure 5 As shown, the driving mechanism 6 also includes an adapter sleeve 62 sleeved on the top of the premixing rod 51, the upper surface of the adapter sleeve 62 is fixedly connected to the support rod 61, the top of the support rod 61 is fixedly connected to the support cylinder 63, and a storage mechanism 7 for replenishing materials to the first premixing bucket 3 is arranged above the support cylinder 63, the outer cylindrical surface of the support rod 61 is fixedly connected to the driven gear 64, and the bottom of the first servo motor 65 is provided with a main gear 67 fixedly connected to the first driving rod 66, and the surfaces of the main gear 67 and the driven gear 64 are jointly sleeved with a gear belt 68.

[0031] like Figure 4 , Figure 5As shown, the inner wall of the adapter sleeve 62 is fixedly connected with clamping grooves arranged in a circular pattern; and the clamping grooves are used in cooperation with the clamping blocks 54 to drive the support rod 61 to rotate.

[0032] Among them, during the raw material premixing operation, the locking covers 31 of the first premixing hopper 3 and the second premixing hopper 4 are opened, and the raw materials are added into the premixing hoppers. The adapter sleeve 62 is sleeved on the top of the premixing rod 51, so that the clamping blocks 54 are clamped into the clamping grooves on the inner wall of the adapter sleeve 62, ensuring that the premixing rod 51 is firmly fixed in the adapter sleeve 62. The first servo motor 65 is started, and the first driving rod 66 starts to rotate, driving the main gear 67 to rotate. The main gear 67 drives the driven gear 64 to rotate through the gear belt 68. The rotation of the driven gear 64 causes the support rod 61 to drive the adapter sleeve 62 to rotate synchronously. The rotation of the adapter sleeve 62 drives the premixing rod 51 to rotate in the first premixing hopper 3. The premixing rod 51 drives the stirring rod 55 to premix the raw materials in the first premixing hopper 3. At the same time, the support rod 56 drives the scraper 57 to scrape off the raw materials remaining on the inner wall of the first premixing hopper 3, avoiding waste caused by raw materials sticking to the inner wall. And during the above operation process, by installing the adapter sleeve 62, it is convenient to replace and repair related transmission parts in the future.

[0033] As Figure 2 、 Figure 3 、 Figure 6 shown, both the front and rear sides of the top of the locking cover 31 are fixedly connected with limit frames 33. A circulation port 32 is opened on one side inside the locking cover 31. The storage mechanism 7 includes a first storage barrel 71 and a second storage barrel 77 respectively arranged above the first premixing hopper 3 and the second premixing hopper 4; and the structures and functions of the first storage barrel 71 and the second storage barrel 77 are the same. Both the front and rear sides of the bottom of the first storage barrel 71 are fixedly connected with support plates 72 used in cooperation with the limit frames 33. A limit rod 73 is fixedly connected to the middle of the bottom of the first storage barrel 71. A circulation pipe 74 is fixedly communicated at the bottom of the first storage barrel 71; and the position of the circulation pipe 74 corresponds to the circulation port 32 for convenient raw material transportation.

[0034] As Figure 2 、 Figure 3 、 Figure 6 shown, the top of the first storage barrel 71 is threadedly connected with a barrel cover 75. A feeding hopper 76 is fixedly communicated with one side of the top of the first storage barrel 71. A filter screen 8 is fixedly connected to the middle of the inside of the first storage barrel 71. An anti-blocking mechanism 9 for cleaning the filter screen 8 is arranged inside both the first storage barrel 71 and the second storage barrel 77 to facilitate the normal filtering operation of the filter screen 8.

[0035] When preparing a two-component polyurethane adhesive, if there are many impurities in the raw materials, it is very easy to cause insufficient subsequent mixing of the raw materials, resulting in inconsistent viscosity and fluidity inside the adhesive, leading to a large number of bubbles and voids in the final product and reducing the usage effect of the product. Therefore, to ensure the mixing effect of the final product, it is necessary to perform a pretreatment operation on the raw materials added to the sealing tank 1. First, insert the support plate 72 of the first storage bucket 71 or the second storage bucket 77 into the limit frame 33 at the top of the locking cover 31 to ensure that the storage bucket is firmly positioned on the locking cover 31. Insert the limit rod 73 into the support cylinder 63 to further enhance the stability of the storage bucket. Ensure that the circulation pipe 74 at the bottom of the storage bucket is accurately aligned with the circulation port 32 on the locking cover 31 so that the raw materials can flow smoothly into the premixing hopper. Add the raw materials to be prepared into the storage bucket through the feeding hopper 76. When the raw materials pass through the filter screen 8, the filter screen 8 will filter out the impurities in the raw materials to ensure that only pure raw materials can enter the premixing hopper. If the filter screen 8 is blocked, the anti-blocking mechanism 9 can be used to clean it to restore its filtering efficiency. The filtered raw materials enter the first premixing hopper 3 through the circulation pipe 74 and the circulation port 32. Once the raw materials enter the premixing hopper, the driving mechanism 6 can be started for premixing operation to ensure that the raw materials are fully mixed. The premixed raw materials can be transported to the sealing tank 1 for further mixing. Through the operation of the driving mechanism 6, it is ensured that the raw materials are evenly mixed in the sealing tank 1, avoiding uneven mixing and bubble generation caused by impurities.

[0036] As Figure 3 , Figure 6 shown, the anti-blocking mechanism 9 includes a second servo motor 91 fixedly connected to the middle of the top of the bucket cover 75. The output end of the second servo motor 91 is fixedly connected to a second driving rod 92. A first cleaning plate 93 fixedly connected to the second driving rod 92 is arranged on the upper surface of the filter screen 8, and a second cleaning plate 94 fixedly connected to the second driving rod 92 is arranged at the inner bottom of the first storage bucket 71.

[0037] As Figure 3 , Figure 6 shown, a belt transmission assembly 95 for simultaneously driving the first storage bucket 71 and the second storage bucket 77 to perform cleaning operations is arranged on the outer circumferential surface of the second driving rod 92.

[0038] When the filter screen 8 is used for a long time to filter the raw materials, the filter screen 8 is easily blocked by the impurities in the raw materials, affecting the subsequent output and filtering effect of the raw materials. At this time, the second servo motor 91 can be started to make the second driving rod 92 rotate. During the rotation of the second driving rod 92, the first cleaning plate 93 and the second cleaning plate 94 are driven to rotate and scrape on the upper surface of the filter screen 8 and the inner bottom of the first storage barrel 71 respectively. The first cleaning plate 93 is used to remove the blocked impurities on the filter screen 8, and at the same time, the second cleaning plate 94 is used to clean the inner bottom of the first storage barrel 71 to prevent the raw materials from not flowing for a long time and adsorbing on the inner bottom of the first storage barrel 71, resulting in uneven mixing and waste of the raw materials. And during the cleaning process of the filter screen 8, since the structures and functions of the first storage barrel 71 and the second storage barrel 77 are the same, and a cleaning component for cleaning the filter screen 8 is provided inside both the first storage barrel 71 and the second storage barrel 77. Therefore, during the process of making the second driving rod 92 rotate by using the second servo motor 91, the cleaning component is driven by the belt transmission component 95 to clean the inside of the second storage barrel 77, thereby improving the working efficiency of the entire cleaning.

[0039] When the present invention is in use, first insert the support plate 72 of the first storage barrel 71 or the second storage barrel 77 into the limit frame 33 at the top of the locking cover 31 to ensure that the storage barrel is firmly positioned on the locking cover 31. Insert the limit rod 73 into the support cylinder 63 to further enhance the stability of the storage barrel. Ensure that the flow pipe 74 at the bottom of the storage barrel is accurately aligned with the flow port 32 on the locking cover 31 so that the raw materials can flow smoothly into the premixing hopper. Add the raw materials to be prepared into the storage barrel through the feeding hopper 76. When the raw materials pass through the filter screen 8, the filter screen 8 will filter out the impurities in the raw materials to ensure that only pure raw materials can enter the premixing hopper. If the filter screen 8 is blocked, the anti-blocking mechanism 9 can be started to clean it and restore its filtering efficiency. Sleeve the adapter sleeve 62 on the top of the premixing rod 51 so that the clamping block 54 is stuck into the card slot on the inner wall of the adapter sleeve 62 to ensure that the premixing rod 51 is firmly fixed in the adapter sleeve 62. Start the first servo motor 65, and the first driving rod 66 starts to rotate, driving the main gear 67 to rotate. The main gear 67 drives the driven gear 64 to rotate through the gear belt 68. The rotation of the driven gear 64 makes the support rod 61 drive the adapter sleeve 62 to rotate synchronously. The rotation of the adapter sleeve 62 drives the premixing rod 51 to rotate in the first premixing hopper 3. The premixing rod 51 drives the stirring rod 55 to perform premixing operation on the raw materials in the first premixing hopper 3. The support rod 56 drives the scraper 57 to scrape the raw materials remaining on the inner wall of the first premixing hopper 3 to prevent the raw materials from sticking to the inner wall and causing waste.

[0040] After the premixing is completed, turn off the first servo motor 65 to ensure that the raw materials in the premixing hopper are fully mixed. Open the discharge valves of the first premixing hopper 3 and the second premixing hopper 4 so that the raw materials inside them flow into the inside of the sealed tank 1. Start the first servo motor 65 to make the first driving rod 66 rotate, and drive the fixed sleeve 101 to rotate synchronously by using the rotation of the first driving rod 66. The fixed sleeve 101 drives the U-shaped limit seat 103 to rotate through the connecting plate 102. The U-shaped limit seat 103 makes a circular motion around the first driving rod 66. Since the outer circumferential surface of the roller 106 is in contact with the inner wall of the sealed tank 1, the roller 106 drives the rotating rod 104 to rotate in the U-shaped limit seat 103, and further makes the rotating rod 104 drive the stirring impeller 105 to rotate. The stirring impeller 105 fully mixes the raw materials inside the sealed tank 1. At the same time, during the rotation of the connecting plate 102, the fixed rod 107 stirs and mixes the raw materials inside the sealed tank 1. Under the double stirring operations of the stirring impeller 105 and the fixed rod 107, it is ensured that the raw materials are evenly mixed.

[0041] This invention covers any substitutions, modifications, equivalent methods and solutions made to the essence and scope of this invention. For the public to have a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention, and those skilled in the art can fully understand this invention without the description of these details. In addition, well-known methods, processes, procedures, components and circuits, etc. are not described in detail to avoid unnecessary confusion to the essence of this invention.

[0042] The above are only the preferred embodiments of this invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of this invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this invention.

Claims

1. A reaction kettle for preparing a polyurethane adhesive, comprising a sealed tank (1), the bottom of the sealed tank (1) being fixedly connected to a discharge pipe, and the top of the sealed tank (1) being threadedly connected to a sealing cover (2); characterized in that: A first premixing bucket (3) and a second premixing bucket (4) are arranged inside the sealed tank (1). The first premixing bucket (3) and the second premixing bucket (4) have the same structure and function. A premixing mechanism (5) for premixing raw materials is arranged inside the first premixing bucket (3) and the second premixing bucket (4). A driving mechanism (6) for driving the premixing mechanism (5) is arranged in the middle of the first premixing bucket (3) and the second premixing bucket (4). The driving mechanism (6) comprises a first servo motor (65) fixedly connected to the middle of the sealing cover (2). A first driving rod (66) is fixedly connected to the output end of the first servo motor (65). The first driving rod (66) passes through the sealed tank (1). A mixing mechanism (10) for mixing a plurality of raw materials is arranged. The mixing mechanism (10) comprises a fixing sleeve (101) fixedly connected to the outer circumferential surface of the first driving rod (66); the outer circumferential surface of the fixing sleeve (101) is surrounded and fixedly connected to a connecting plate (102); the fixing sleeve (101) is fixedly connected to a U-shaped limit seat (103) via the connecting plate (102); the interior of the U-shaped limit seat (103) is rotatably connected to a rotating rod (104); the outer circumferential surface of the rotating rod (104) is fixedly connected to a stirring impeller (105); and the upper end of the outer circumferential surface of the rotating rod (104) is fixedly connected to a roller (106).

2. A reaction kettle for preparing a polyurethane adhesive according to claim 1, characterized in that: The outer circumferential surface of the roller (106) fits against the sealed can (1) to facilitate the roller (106) to rotate on the sealed can (1), and the bottom of the connecting plate (102) is fixedly connected to fixed rods (107) arranged in a linear shape.

3. A reaction kettle for preparing a polyurethane adhesive according to claim 2, characterized in that: The top open end of the first premixing bucket (3) is threadedly connected to a locking cover (31), the premixing mechanism (5) comprises a premixing rod (51) rotatably connected to the middle of the first premixing bucket (3), a fixing seat (52) fixedly connected to the inner wall of the first premixing bucket (3) is provided at the bottom of the premixing rod (51), and limiting circular plates (53) fixedly connected to the outer circumferential surface of the premixing rod (51) are provided on the upper and lower surfaces of the locking cover (31), and the outer circumferential surface of the premixing rod (51) is fixedly connected to linearly arranged stirring rods (55).

4. A reaction kettle for preparing a polyurethane adhesive according to claim 3, characterized in that: The premixing mechanism (5) further comprises a support rod (56) fixedly connected to the middle of the outer circumferential surface of the premixing rod (51); the premixing rod (51) is fixedly connected to a scraper (57) for scraping residual raw materials on the inner wall of the first premixing bucket (3) via the support rod (56); and a clamping block (54) for use with the driving mechanism (6) is disposed around the top of the outer circumferential surface of the premixing rod (51).

5. A reaction kettle for preparing a polyurethane adhesive according to claim 4, characterized in that: The driving mechanism (6) further comprises an adapter sleeve (62) sleeved on the top of the premixing rod (51); a support rod (61) is fixedly connected to the upper surface of the adapter sleeve (62); a support cylinder (63) is fixedly connected to the top of the support rod (61); a material storage mechanism (7) for replenishing material to the first premixing bucket (3) is arranged above the support cylinder (63); a driven gear (64) is fixedly connected to the outer circumferential surface of the support rod (61); a main gear (67) fixedly connected to the first driving rod (66) is arranged at the bottom of the first servo motor (65); and a gear belt (68) is sleeved on the surfaces of the main gear (67) and the driven gear (64).

6. A reaction kettle for preparing a polyurethane adhesive according to claim 5, characterized in that: The inner wall of the adapter sleeve (62) is fixedly connected with circumferentially arranged clamping grooves; and the clamping grooves cooperate with the clamping blocks (54) to drive the support rod (61) to rotate.

7. A reaction kettle for preparing a polyurethane adhesive according to claim 6, characterized in that: The front and rear sides of the top of the locking cover (31) are fixedly connected to the limiting frame (33), and a flow port (32) is opened on one side of the interior of the locking cover (31). The material storage mechanism (7) comprises a first material storage barrel (71) and a second material storage barrel (77) which are respectively arranged above the first premixing bucket (3) and the second premixing bucket (4); and the first material storage barrel (71) and the second material storage barrel (77) have the same structure and function; the front and rear sides of the bottom of the first material storage barrel (71) are fixedly connected to a support plate (72) used in conjunction with the limiting frame (33); the middle of the bottom of the first material storage barrel (71) is fixedly connected to the limiting rod (73); and the bottom of the first material storage barrel (71) is fixedly connected to a flow pipe (74); and the position of the flow pipe (74) corresponds to the flow port (32) to facilitate the transportation of raw materials.

8. A reaction kettle for preparing a polyurethane adhesive according to claim 7, characterized in that: The top of the first material storage barrel (71) is threadedly connected to a barrel cover (75), one side of the top of the first material storage barrel (71) is fixedly connected to a lower hopper (76), a filter screen (8) is fixedly connected to the middle of the interior of the first material storage barrel (71), and the interiors of the first material storage barrel (71) and the second material storage barrel (77) are both provided with anti-clogging mechanisms (9) for cleaning the filter screen (8) so as to ensure normal filtering operation of the filter screen (8).

9. A reaction kettle for preparing a polyurethane adhesive according to claim 8, characterized in that: The anti-blocking mechanism (9) comprises a second servo motor (91) fixedly connected to the middle of the top of the barrel cover (75); the output end of the second servo motor (91) is fixedly connected to a second driving rod (92); the upper surface of the filter screen (8) is provided with a first cleaning plate (93) fixedly connected to the second driving rod (92); and the bottom of the first material storage barrel (71) is provided with a second cleaning plate (94) fixedly connected to the second driving rod (92).

10. A reaction kettle for preparing a polyurethane adhesive according to claim 9, characterized in that: The outer circumferential surface of the second driving rod (92) is provided with a belt driving assembly (95) for simultaneously driving the first material storage barrel (71) and the second material storage barrel (77) to perform a cleaning operation.

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